A breathable blend of woolly warmth, venting, & rider-specific support & cushioning. Features 30% Nylon / 34% Merino Wool / 24% Acrylic / 10% Polypropylene / 2% Spandex ultra quick-drying & Stink-Proof Polypropylene Reinforced Footbed Medium-Density Cushioning Throughout Sock Elastic Arch & Ankle Supports Chafe-Free Link Toe Seam Stay High Comfort Band Midweight